package com.ktjy.utils;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.InputStream;

public class MyBatisUtil {
    private static SqlSessionFactory factory;

    static { //通过静态代码块,唯一一次创建sqlSessionFactory实例
        try {
            InputStream is = Resources.getResourceAsStream("mybatis-config.xml");
            factory = new SqlSessionFactoryBuilder().build(is);

        }catch (IOException e){
            throw new RuntimeException("初始化失败",e);
        }
    }

    //创建并返回sqlsession实例
    public static SqlSession createSqlSession(){
        return factory.openSession(false); //关闭自动提交开启事务
    }

    //关闭
    public static void closeSqlSession(SqlSession sqlSession){
        if (sqlSession != null){
            sqlSession.close();
        }
    }
}
